The sky is round and the place is round

Seeing that Zhang Xianxian was a little confused, Wang Kang smiled and said: "Let me put it another way, what do you think the shape of the world we are in is like? What is the sky like? What is the earth like?"

This time Zhang Xianxian understood and said directly: "It would be ridiculous if you use this to test me."

"The sky is round and the earth is round," Zhang Xianxian said calmly.

hehe……

Wang Kang looked like I knew you would say this.

Is it this expression again? Zhang Xianxian almost bit her silver teeth, feeling that Wang Kang looked quite disdainful, which hurt her heart.

I have never been so frustrated.

Zhang Xianxian gritted his teeth and said, "What? Could it be that Master Kang has other high ideas?"

Wang Kang asked: "Then let me ask you, does your theory of a round sky and a round earth have any basis?"

"Of course what I said is well-founded. Who else is like you and says some incomprehensible words?"

Zhang Xianxian said in a cold voice: "We call the area we see when we look up the sky, and the fields we rely on for survival we call the earth."

"Through observation, we can find that celestial bodies such as the sun and the moon are in endless motion, just like a closed circle without beginning or end."

"But the earth carries us quietly, just like a square object that is still and stable!"

"This is the round sky and a square place!"

Afraid of Wang Kang's rebuttal, Zhang Xianxian added: "If it weren't like this, and it was rotating like a ball like the sun and the moon, do you think we would be able to stand firm?"

"Wouldn't the other side fall down?"

After saying that, Zhang Xianxian looked at Wang Kang with a demonstrative look. Ordinary people would never study this kind of theory, and only she could explain it so clearly and transparently!

Reasonable and well-founded!

After hearing this, Lin Yuyan and Li Qingman also nodded in approval. This explanation indeed made sense.

But they were confused, why did the style of painting suddenly change and become an academic seminar?

It’s still such a partial discussion.

"Haha!" Wang Kang laughed after hearing this.

Zhang Xianxian looked at her coldly, "Why are you laughing?"

"I laugh at your ignorance!"

"What did you say?" Zhang Xianxian couldn't bear it anymore and stood up immediately.

This was the first time she heard such words from someone else. She was Zhang Xianxian, who knew astronomy and geography.

Why does she look down on others? It's because she thinks others are stupid and cannot explain some phenomena, so she talks about ghosts and gods.

And what Wang Kang said was the biggest insult to her.

Wang Kang didn't seem to notice Zhang Xianxian's anger, and said with a faint smile: "It is said that the daughter of Marquis Xuanping, although she is a girl, has the talents of a prime minister!"

"He is well versed in ancient and modern times, knows astronomy, and understands geography. Now it seems that his knowledge is only ordinary."

"Isn't this ignorance?"

Zhang Xianxian snorted coldly, sat down again, and returned to her calm look. She felt that there was no need to be serious with a prodigal.

What does he know?

In addition to the label of gangster, an arrogant man should now be added to his label.

"I think you are making sophistry because you can't explain it and can't justify it."

Zhang Xianxian said coldly: "I can probably understand your intention, but you just want to defeat me in this way. But I can tell you, not only did you choose the wrong person, you also chose the wrong door!

"

"Let's first talk about why apples fall to the ground. What did you say about gravity? It's a word I've never heard of before!"

"This leads to this question. I gave you an explanation, but you don't recognize it. I think you are just messing around and can't recognize yourself!"

Zhang Xianxian's words were rude.

"The round sky and the square earth are wrong, and you don't know it yet!"

Wang Kang met Zhang Xianxian's gaze and said, "Where we are is like the sun and the moon, both spheres!"

"The sky is round and so is the earth!"

"That's what you said?" Zhang Xianxian said disdainfully. She felt that telling this guy this was a waste of time.

If you play the lute to a cow, will it understand it? No, it will make a moo-moo sound. This is the situation now.

"I know you don't believe it," Wang Kang said calmly, "Then I will give you an explanation!"

"Want to hear the details!" Zhang Xianxian said disdainfully.

See what flowers you can name.

Wang Kang asked: "Ms. Zhang, have you ever seen a sailboat going out to sea?"

"Of course I have seen it. I once went to the State of Lu to board a ship and travel," Zhang Xianxian rolled her eyes and said, "Why do you ask this? You have never seen it."

"Hillbilly!"

Wang Kang coughed dryly and said, "Miss Zhang, have you ever noticed that when a ship sails towards the horizon, it does not become smaller and smaller until it is no longer visible?

"Instead, the hull appeared to sink below the horizon first, then the mast."

"When a ship returns from the sea, the sequence is reversed: first the mast, then the hull, rising from the horizon..."

"You mean this?" Zhang Xianxian looked unnatural. She was curious about this, so she also observed it, but she didn't think about it in detail.

"What does this mean?"

"It means it is a curved surface, not straight."

"This?" Zhang Xianxian frowned slightly, thinking carefully, it seemed that this was indeed the case.

And Wang Kang said: "There is also the simplest method. Assume that the ground is flat, then no matter how high the altitude is, you can see the same distance."

"Well, elevation is the vertical distance above sea level at a point on the ground."

Zhang Xianxian couldn't help but think along what Wang Kang said.

"But the fact is that it is difficult for you to see. No matter how good your eyesight is, there will be a limit. This is because the curvature of the spherical surface limits our line of sight!"

"Unless you climb a tree or climb a mountain and look down from a high place, that's where climbing to see farther comes."

Seeing that Zhang Xianxian was silent, Wang Kang smiled and said, "Others can't understand what I'm saying for a while, but you should be able to, right?"

"If you don't understand, just think I'm talking in vain."

"Are these two points the only evidence?" After thinking for a moment, Zhang Xianxian asked.

"Of course there are, but you can't understand them!"

"You..." Zhang Xianxian looked unnatural, because she had never heard of the words Wang Kang introduced just now.

Although I don’t understand it, I don’t know how serious it is.

If you think about it carefully, it does make some sense. Doesn't this overturn her understanding?

Impossible, absolutely impossible!

She doesn't just stand firm in her own theories. There are no absolutes in the world.

She didn't believe that this was coming from Wang Kang's mouth.

"But what does this have to do with the apple falling?"

Zhang Xianxian decided not to continue talking about this, otherwise she might be embarrassed.

Because she could barely keep up with Wang Kang's thinking.

"Of course it does matter!"

Wang Kang smiled and said: "You said that if the ground is not square and stationary, then we will not stand firm."

"The reason for this is gravity. Just like an apple falling to the ground, it is because the earth we live on has a gravitational pull on the apple, which is the gravity of the earth!"

"It attracts apples. When the apples mature, they will detach from the branches, and the earth's gravity will attract them to the ground, and the apples will fall to the ground!"
Chapter completed!